Posted by cjt on August 8, 2009, 7:37 pm
Eeyore wrote:
>
> "misterfact@yahoo.com" wrote:
>
>
>>Hello;
>>
>> I am still looking to buy the following:
>>
>>1 a QUALITY electric car.
>>
>>2. The car must have a removable battery pack.
>>
>>3. The car must have a wheeled dolly to remove the pack (if needed)
>>Or I could probably fabricate my own dolly.
>>
>>4. solar panels to charge one pack during the day, while I'm out
>>driving the car.
>>
>>5. I suppose a large capacitor could be charged by the panels; then
>>the charged dumped into the car's batteries at night without having to
>>transfer battery packs.
>>
>>The whole package must have a good warranty.
>>
>>There is no reason to plug the car into the grid when one or two
>>day's of sunlight or cloudy bright sunlight on 1200watts of solar panels
>>
>>can do the job
>
>
> Vast mistake in the above assumption. Learn something about insolation, PV
> panel efficiency and power required to travel a sensible distance in a
> vehicle.
>
>
>
>>There is no reason why consumers should have to put together or
>>fabricate the above with no guarantee of success.
>
>
> It would void the laws of physics, given a sensible range.
>
>
>
>>Anyone building a 100% solar powered car out there like this with a
>>GOOD WARRANTY?
>
>
> No, because it can't be done.
>
> Graham
>
>
> --
> due to the hugely increased level of spam please make the obvious
> adjustment to my email address
>
>
There have been experimental (small) cars built that run solely on
solar power. If that's possible with current low-efficiency devices,
surely it should not violate the laws of physics to do something on
a somewhat larger scale with, in effect, double or more panel size
(i.e. one on the car and another at home). I note that the OP did
not limit the size of the panels at home to just what would fit on
a car.
Perhaps it's just a lack of imagination, motivation, time and economics
holding us back, rather than the laws of physics?
Posted by Bruce Richmond on August 8, 2009, 8:44 pm
> Eeyore wrote:
> > "misterf...@yahoo.com" wrote:
> >>Hello;
> >> I am still looking to buy the following:
> >>1 a QUALITY electric car.
> >>2. The car must have a removable battery pack.
> >>3. The car must have a wheeled dolly to remove the pack (if needed)
> >>Or I could probably fabricate my own dolly.
> >>4. solar panels to charge one pack during the day, while I'm out
> >>driving the car.
> >>5. I suppose a large capacitor could be charged by the panels; then
> >>the charged dumped into the car's batteries at night without having to
> >>transfer battery packs.
> >>The whole package must have a good warranty.
> >>There is no reason to plug the car into the grid when one or two
> >>day's of sunlight or cloudy bright sunlight on 1200watts of solar panels
> >>can do the job
> > Vast mistake in the above assumption. Learn something about insolation, PV
> > panel efficiency and power required to travel a sensible distance in a
> > vehicle.
> >>There is no reason why consumers should have to put together or
> >>fabricate the above with no guarantee of success.
> > It would void the laws of physics, given a sensible range.
> >>Anyone building a 100% solar powered car out there like this with a
> >>GOOD WARRANTY?
> > No, because it can't be done.
> > Graham
> > --
> > due to the hugely increased level of spam please make the obvious
> > adjustment to my email address
> There have been experimental (small) cars built that run solely on
> solar power. If that's possible with current low-efficiency devices,
> surely it should not violate the laws of physics to do something on
> a somewhat larger scale with, in effect, double or more panel size
> (i.e. one on the car and another at home).
Look them up. If you find one that you think would be practical to
drive in normal traffic post a link to it.
>I note that the OP did
> not limit the size of the panels at home to just what would fit on
> a car.
> Perhaps it's just a lack of imagination, motivation, time and economics
> holding us back, rather than the laws of physics?- Hide quoted text -
> - Show quoted text -
Posted by cjt on August 8, 2009, 10:44 pm
Bruce Richmond wrote:
>
>>Eeyore wrote:
>>
>>
>>>"misterf...@yahoo.com" wrote:
>>
>>>>Hello;
>>
>>>>I am still looking to buy the following:
>>
>>>>1 a QUALITY electric car.
>>
>>>>2. The car must have a removable battery pack.
>>
>>>>3. The car must have a wheeled dolly to remove the pack (if needed)
>>>>Or I could probably fabricate my own dolly.
>>
>>>>4. solar panels to charge one pack during the day, while I'm out
>>>>driving the car.
>>
>>>>5. I suppose a large capacitor could be charged by the panels; then
>>>>the charged dumped into the car's batteries at night without having to
>>>>transfer battery packs.
>>
>>>>The whole package must have a good warranty.
>>
>>>>There is no reason to plug the car into the grid when one or two
>>>>day's of sunlight or cloudy bright sunlight on 1200watts of solar panels
>>
>>>>can do the job
>>
>>>Vast mistake in the above assumption. Learn something about insolation, PV
>>>panel efficiency and power required to travel a sensible distance in a
>>>vehicle.
>>
>>>>There is no reason why consumers should have to put together or
>>>>fabricate the above with no guarantee of success.
>>
>>>It would void the laws of physics, given a sensible range.
>>
>>>>Anyone building a 100% solar powered car out there like this with a
>>>>GOOD WARRANTY?
>>
>>>No, because it can't be done.
>>
>>>Graham
>>
>>>--
>>>due to the hugely increased level of spam please make the obvious
>>>adjustment to my email address
>>
>>There have been experimental (small) cars built that run solely on
>>solar power. If that's possible with current low-efficiency devices,
>>surely it should not violate the laws of physics to do something on
>>a somewhat larger scale with, in effect, double or more panel size
>>(i.e. one on the car and another at home).
>
>
> Look them up. If you find one that you think would be practical to
> drive in normal traffic post a link to it.
>
I never said they were. But I don't think they're so far away
from realistic that, e.g., even a tripling of efficiency wouldn't
make them practical. That is to say, the laws of physics aren't
the obvious problem.
>
>> I note that the OP did
>>not limit the size of the panels at home to just what would fit on
>>a car.
>>
>>Perhaps it's just a lack of imagination, motivation, time and economics
>>holding us back, rather than the laws of physics?- Hide quoted text -
>>
>>- Show quoted text -
>
>
Posted by Bruce Richmond on August 8, 2009, 11:34 pm
> Bruce Richmond wrote:
> >>Eeyore wrote:
> >>>"misterf...@yahoo.com" wrote:
> >>>>Hello;
> >>>>I am still looking to buy the following:
> >>>>1 a QUALITY electric car.
> >>>>2. The car must have a removable battery pack.
> >>>>3. The car must have a wheeled dolly to remove the pack (if needed)
> >>>>Or I could probably fabricate my own dolly.
> >>>>4. solar panels to charge one pack during the day, while I'm out
> >>>>driving the car.
> >>>>5. I suppose a large capacitor could be charged by the panels; then
> >>>>the charged dumped into the car's batteries at night without having to
> >>>>transfer battery packs.
> >>>>The whole package must have a good warranty.
> >>>>There is no reason to plug the car into the grid when one or two
> >>>>day's of sunlight or cloudy bright sunlight on 1200watts of solar panels
> >>>>can do the job
> >>>Vast mistake in the above assumption. Learn something about insolation, PV
> >>>panel efficiency and power required to travel a sensible distance in a
> >>>vehicle.
> >>>>There is no reason why consumers should have to put together or
> >>>>fabricate the above with no guarantee of success.
> >>>It would void the laws of physics, given a sensible range.
> >>>>Anyone building a 100% solar powered car out there like this with a
> >>>>GOOD WARRANTY?
> >>>No, because it can't be done.
> >>>Graham
> >>>--
> >>>due to the hugely increased level of spam please make the obvious
> >>>adjustment to my email address
> >>There have been experimental (small) cars built that run solely on
> >>solar power. If that's possible with current low-efficiency devices,
> >>surely it should not violate the laws of physics to do something on
> >>a somewhat larger scale with, in effect, double or more panel size
> >>(i.e. one on the car and another at home).
> > Look them up. If you find one that you think would be practical to
> > drive in normal traffic post a link to it.
> I never said they were. But I don't think they're so far away
> from realistic that, e.g., even a tripling of efficiency wouldn't
> make them practical. That is to say, the laws of physics aren't
> the obvious problem.
Yes, they are. Electric motors are already ~95% efficient. Explain
how you think they are going to be made two or three times more
efficient. The solar cells used in those cars were already on the
bleading edge of current technology. Gains are made in very small
increments, and the bleading edge stuff is very expensive. With the
comment about wanting a "GOOD WARRANTY" I didn't figure this was a
"money is no problem" request.
> >> I note that the OP did
> >>not limit the size of the panels at home to just what would fit on
> >>a car.
> >>Perhaps it's just a lack of imagination, motivation, time and economics
> >>holding us back, rather than the laws of physics?- Hide quoted text -
> >>- Show quoted text -- Hide quoted text -
> - Show quoted text -- Hide quoted text -
> - Show quoted text -
My comments above were talking about a car running off onboard solar
panels. If you want to allow additional equipment at home that is a
different game. Just buy a new Nissan.
http://www.guardian.co.uk/business/2009/aug/02/nissan-unveils-electri ...
It should come with a "GOOD WARRANTY". Buy the 1200 watts of solar
panels and a bank of deep discharge batteries (in addition to the
battery pack you had to get for the Nissan, since it doesn't come with
one). Then buy a DC to DC charger. Charge the battery bank all day,
then use it to charge the car battries over night. Be sure to get
enough panels and batteries to hold you over on those cloudy days. If
you shop around you might be able to get all this for four or five
times the cost of a gasoline powered car. If you don't want to put
this all together on your own I am sure there are businesses out there
that would be happy to do it for a fee.
Posted by Eeyore on August 13, 2009, 3:30 pm
Bruce Richmond wrote:
> > Bruce Richmond wrote:
< snip>
> > I never said they were. But I don't think they're so far away
> > from realistic that, e.g., even a tripling of efficiency wouldn't
> > make them practical. That is to say, the laws of physics aren't
> > the obvious problem.
> Yes, they are. Electric motors are already ~95% efficient. Explain
> how you think they are going to be made two or three times more
> efficient. The solar cells used in those cars were already on the
> bleading edge of current technology. Gains are made in very small
> increments, and the bleading edge stuff is very expensive. With the
> comment about wanting a "GOOD WARRANTY" I didn't figure this was a
> "money is no problem" request.
http://en.wikipedia.org/wiki/Planck_constant#Photoelectric_effect
Graham
--
due to the hugely increased level of spam please make the obvious adjustment to
my
email address
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> "misterfact@yahoo.com" wrote:
>
>
>>Hello;
>>
>> I am still looking to buy the following:
>>
>>1 a QUALITY electric car.
>>
>>2. The car must have a removable battery pack.
>>
>>3. The car must have a wheeled dolly to remove the pack (if needed)
>>Or I could probably fabricate my own dolly.
>>
>>4. solar panels to charge one pack during the day, while I'm out
>>driving the car.
>>
>>5. I suppose a large capacitor could be charged by the panels; then
>>the charged dumped into the car's batteries at night without having to
>>transfer battery packs.
>>
>>The whole package must have a good warranty.
>>
>>There is no reason to plug the car into the grid when one or two
>>day's of sunlight or cloudy bright sunlight on 1200watts of solar panels
>>
>>can do the job
>
>
> Vast mistake in the above assumption. Learn something about insolation, PV
> panel efficiency and power required to travel a sensible distance in a
> vehicle.
>
>
>
>>There is no reason why consumers should have to put together or
>>fabricate the above with no guarantee of success.
>
>
> It would void the laws of physics, given a sensible range.
>
>
>
>>Anyone building a 100% solar powered car out there like this with a
>>GOOD WARRANTY?
>
>
> No, because it can't be done.
>
> Graham
>
>
> --
> due to the hugely increased level of spam please make the obvious
> adjustment to my email address
>
>